<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<!--需求1：分别定义两个 div、span标签，分别修改每个 div 标签的样式为：边框1个像素，实线，红色。-->
<div style="border: 1px solid red">div标签</div>
<div style="border: 1px solid red">div标签</div>
<span style="border: 1px solid red">span标签</span>
<span style="border: 1px solid red">span标签</span>

</body>
</html>